Burner nozzles



Jan. 6, 1970 E's/MR 5 3,488,005

B URNER NOZZLES Original Filed Aug. 31, 1965 I I0 18 [8 l9 )9 FIG. 5

CLARENCE P. BAKER INVENTOR.

snq/wida ATTORNEY.

United States Patent .0

BURNER NOZZLES Clarence P. Baker, 3116 NE. Everett,

Portland, Oreg. 97232 Continuation of application Ser. No. 483,943, Aug. 31,

1965. This application Aug. 7, 1967, Ser. No. 671,904 Int. Cl. F23d 11/38, 13/44 US. Cl. 239-493 Claims ABSTRACT OF THE DISCLOSURE A burner nozzle, having a central orifice, is provided with an annular lip, forming a reservoir, a concentric annular shroud, having radially spaced openings communicating between the reservoir and orifice, a recessed inner core, having spinner grooves on its upper surface and transverse passageways from its recess, and a core retainer, having an axial passageway.

This is a continuation of Ser. No. 483,943, filed Aug. 31, 1965, now abandoned, for Burner Nozzles.

My invention relates to burner nozzles for pressurized systems using all weights of fuel, whether such burners be of the gun type or the vortex type.

One object of my invention is to provide a fuel nozzle which has a reservoir externally of the nozzle orifice.

Another object of my invention is to provide a burner nozzle which has a shroud encircling the orifice, extending to a point beyond the head of the nozzle and occupyinga position intermediately of said nozzle orifice and said external reservoir.

Still another object of my invention is to provide a burner nozzle which has vents or openings through the shroud.

A further object of my invention is to provide a burner nozzle which is more efiicient in the conservation of fuel by utilizing the atomized fuel normally lost by conventional nozzles now in use through dripping or capillary siphoning action.

A still further object of my invention is to provide a burner nozzle which, while in operation, causes auxiliary air and unatomized fuel in its external reservoir to be drawn through the vents or openings in the shroud and injected into the base of the spray pattern or flame at the nozzle orifice.

Still another and further object of my invention is to provide a burner nozzle which requires no special tools or adjustments and which has no moving parts.

A still other and further object of my invention is to provide a burner nozzle which atomizes fuel so completely that a smaller size nozzle than the conventional type normally required can usually be used with any particular burner.

Other and further objects of my invention will be apparent from the specification and claims hereinafter set forth.

The burner nozzle described herein is an improvement over and development from the oil burner nozzle set forth in my United States Patent No. 3,223,331, issued Dec. 14, 1965. The main differentiating features between my patent and the burner nozzle herein described reside in the elimination of the valve and spring incorporated in the patented invention and the addition of a shield or shroud element, provided with vents or passageways therethrough, in a position between the nozzle orifice and the circumscribing lip forming an exterior reservoir. My improved nozzle produces a consistently fuller and more uniform flame than the device of my patent and still retains the properties of conserving fuel and preventing drips or capillary overflow from falling away from the ice nozzle and onto the floor or other surfaces of the burning area.

Referring to the drawings:

FIG. 1 is a sectional elevation view of my improved burner nozzle taken along line 11 of FIG. 2 in the direction of the arrows, showing the external reservoir at the nozzle tip, the nozzle orifice in the tip, the shroud with its vents or passageways between the orifice and the reservoir, the inner core with its recesses and passageways and a conventional, porous type filter.

FIG. 2 is a top view of the nozzle, showing its external lip and reservoir, the shroud positioned concentrically thereof, the vents or openings through said shroud and the nozzle tip with its orifice positioned concentrically of said shroud.

FIG. 3 is an elevation view of the nozzle with a portion thereof broken away showing the intermediately positioned, concentric shroud or shield with its passageways and the relation of said shroud to the external lip and reservoir of the burner nozzle.

FIG. 4 is a top-plan view of the inner core of my burner nozzle, showing the spinner grooves on its upper surface and also showing in broken lines the recess opening at its lower surface and the transverse core passageways connecting therewith.

FIG. 5 is a bottom plan view of the core retainer, showing its axial passage, diametrically disposed kerf and engaging threads.

Referring further to the drawings:

The nozzle head 10 of my invention is basically of conventional design and configuration. It is, however, provided with a reservoir 11 at the nozzle tip containing the orifice opening 12 therethrough; and a shroud or shielding member 14 positioned between the orifice 12 and the lip 13 of reservoir 11. The member 14 may be any desired design from straight through curved sides, cylindrical, frustum of a cone, several pieces in spaced relationship, etc. It is provided with vents, passageways or openings 18 positioned at or near its lowermost portion which connect the reservoir 11 formed by lip 13 with the reservoir 14a formed by the shroud 14 or may be spaced above the reservoir bottoms. The lengths of the lip 13 and of the shroud 14 are so proportioned to the exterior tip of the nozzle containing orifice 12 that a flame angle of nearly 180 can be obtained. It is well known that conventional nozzles have flame angles ranging from 15 to The shroud 14, however, is preferably shorter than lip 13 but extended forwardly of the orifice 12. Provided with the features just described, lip 13 and shroud 14 are so dimensioned that they will not interfere with the flame produced but will catch fuel dribbles or capillary siphoning emitting from the orifice 12 whether the nozzle is used on a vortex or horizontal gun-type burner. The walls of the reservoir 11 formed by lip 13 and shroud 14 may also be extended a substantial distance rearwardly of the outer end of orifice 12. Preferably, but not necessarily, the inner walls of lip 13 and the walls of shroud 14 will be formed to have a greater diameter at their rearward ends than at their forward ends. The nozzle head 10 is also provided with conventional, polyhedronal sides 15 medially thereof and with a conventional threaded portion 16 externally at its rearward end, the end opposite from the orifice 12 in the nozzle tip. The nozzle head 10 is hollow or recessed from its rearward end and is further provided with threads internally thereof. An inner core 17 is slidably positioned within the nozzle head 10 immediately in back of the orifice 12 through its tip end. Said inner core 17 is so shaped and designed as to allow fuel to flow through it and between it and the inner surface of the nozzle head 10. The upper surface of the inner core is preferably provided with means 19, such as fuel feed and spinner grooves, to facilitate the passage of fuel to the orifice 12. Said core 17 is also provided with a,

recess extending longitudinally from its rearmost end forwardly and with diametrically disposed passageways 20 therethrough near its lower edge which intersect recess 21. A core-retaining element 24 is provided with threads complementary to those on the inner surface of the recess in nozzle head 10 and with a diametrically disposed kerf 26 On its lowermost surface to enable engaging and disengaging said core retainer with the threads of :head 10 and thereby to retain core 17 in position within said head. The core retainer 24 is also provided with a longitudinal axial passageway 25 from its rearmost to its foremost surface. A conventional filter 29, such as a porous or screen type, is threadedly engaged with the nozzle head 10 below the core retainer to complete my improved fuel nozzle.

In operation the pump of the system in which my nozzle is installed forces fuel through the filter 29 and the longitudinal axial passageway 25 of the core retainer 24, into the recess in the inner core 17 and out through the diametrically disposed passageways 20 therethrough, between the outer surface of the core 17 and the inner surface of nozzle head 10, through the spinner grooves 19 in the upper surface of the inner core 17 and out through the orifice 12 in the tip of the nozzle head. The pressurized and spinning fuel breaks into a fine spray or vapor upon striking the atmosphere and fans out into the predetermined angle to be ignited by the electrodes, or other igniting means, of the burning system. The length of the lip 13 of reservoir 11 and of the shroud 14 are so dimensioned that neither the lip nor the shroud will interfere with any desirable angle of flame but will still be sufficient to catch dribbles of fuel trickling or capillarying out I of the nozzle orifice 12 at the beginning and ending of the burning cycle. The reservoir 11 retains the escaped fuel until the burning cycle again commences. When this occurs, the fuel in the reservoir will be drawn through the vents or passageways 18 in the shroud 14 together with v duced diameters.

in thequality of the flame are great enough to be visible to the naked eye.

It is to be understood that the improved burner no'zzle herein disclosed is .merely a preferred embodiment of my invention, primarily adapted to hydrocarbon burners, and that many variations thereof are feasible without departing from the spirit of my invention.

Having thus described my invention, I claim:

1. A burner nozzle comprising (a) a head having an orifice of predetermined flame angle through the front end thereof, I

(b) an annular imperforate lip integral with the head and circumscribing the orifice, the lip defining a reservoir for liquid fuel,

(c) an annular shroud integral with the head and coaxial with the orifice, the shroud being positioned between the lip and orifice,

(d) the shroud having a plurality of circumferentially spaced passageways therethrough communicating with the reservoir,

(e) the lip and shroud projecting forward beyond'the front end of the orifice and terminating at their front ends rearward of the flame angle of the orifice.

2. The burner nozzle of claim 1 wherein the passageways are located adjacent the rearward end of the shroud.

3. The burner nozzle of claim 1 wherein the rearward ends of the lip and shroud are located rearward of the front end of the orifice.

4. The burner nozzle of claim 1 wherein the front end of the shroud terminates rearward of the front end of the lip.

5. The burner nozzle of claim 1 wherein the inner walls of the lip and shroud converge forwardly to re- References Cited UNITED STATES PATENTS 2,577,238 12/1951 Edvinson et al. 239103 3,014,667 12/1961 Mclean et al. 239428.5 3,223,331 12/1965 Baker 239464 M. HENSON WOOD, JR., Primary Examiner MICHAEL Y. MAR, Assistant Examiner US. Cl. X.R. 239590.3 

